elixir.ex

defmodule Test1 do
    def upto(n) when n > 0 do
        1..n |> Enum.map(&fizzbuzz/1)
    end
    
    defp fizzbuzz(n) when rem(n, 3) == 0 and rem(n, 5) == 0, do: "FizzBuzz"
    defp fizzbuzz(n) when rem(n, 3) == 0, do: "Fizz"
    defp fizzbuzz(n) when rem(n, 5) == 0, do: "Buzz"
    defp fizzbuzz(n), do: n
    
end

defmodule Test2 do
    def upto(n) when n > 0 do
        1..n |> Enum.map(&fizzbuzz/1)
    end
    
    defp fizzbuzz(n) do:
        cond do
            rem(n, 3) == 0 and rem(n, 5) == 0 ->
                "FizzBuzz"
            rem(n, 3) == 0 ->
                "Fizz"
            rem(n, 5) == 0 ->
                "Buzz"
            true ->
                n
        end
    end
end